Pen



FIG. 1 is a perspective view of our new design.

FIG. 2 is a front elevation view.

FIG. 3 is a rear elevation view.

FIG. 4 is a side elevation view, the opposite side being substantially amirror image thereof.

FIG. 5 is a top end view; and,

FIG. 6 is a bottom end view.

The ornamental design for a pen, as shown and described.